71840244 has 24 divisors (see below), whose sum is σ = 191574208. Its totient is φ = 20525760.

The previous prime is 71840239. The next prime is 71840261. The reversal of 71840244 is 44204817.

It is a super-2 number, since 2×71840244² = 10322041315959072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427537 + ... + 427704.

Almost surely, 2^71840244 is an apocalyptic number.

It is an amenable number.

71840244 is an abundant number, since it is smaller than the sum of its proper divisors (119733964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71840244 is a wasteful number, since it uses less digits than its factorization.

71840244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855255 (or 855253 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 71840244 is about 8475.8624339945. The cubic root of 71840244 is about 415.7088461365.

The spelling of 71840244 in words is "seventy-one million, eight hundred forty thousand, two hundred forty-four".